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CN-121995671-A - Reflective multi-screen-overlapping module with front light and display device

CN121995671ACN 121995671 ACN121995671 ACN 121995671ACN-121995671-A

Abstract

The invention relates to the technical field of reflective liquid crystal display. The invention discloses a reflective multi-screen-overlapping module with front light and a display device, wherein a front light guide plate is positioned at one side of the display module, the light supplementing light source is positioned at one end of the front light guide plate, which is close to the non-display area, so that light rays emitted by the light supplementing light source are uniformly emitted by the front light guide plate and then are emitted into the reflective liquid crystal panel. By arranging transition pixels or an outward-shifting shading area at the edge of an effective display area at the light source side of a lower screen, large-angle incident light rays from front light can be fully reflected and mixed by corresponding pixels of each layer of screen in a final effective display area, so that the color layering phenomenon at the edge of the screen when the front light is started is thoroughly eliminated, uniform color mixing of the whole area is realized, and the overall display image quality and visual effect of a display module are remarkably improved.

Inventors

  • WU WEIZHONG

Assignees

  • 安徽煜图科技有限公司

Dates

Publication Date
20260508
Application Date
20260408

Claims (10)

  1. 1. The reflection type multi-screen-overlapping module with the front light is characterized by comprising a front light module and a display module; The front light module comprises a light guide plate and a light supplementing light source, the display module comprises an effective display area and a non-display area, the front light guide plate is positioned at one side of the display module, and the light supplementing light source is positioned at one end of the front light guide plate, which is close to the non-display area, so that light rays emitted by the light supplementing light source are uniformly emitted by the front light guide plate and then are emitted into a reflective liquid crystal panel of the display module; The display module comprises a top liquid crystal panel and at least one lower liquid crystal panel, wherein the pixel layout of the lower liquid crystal panel at the edge of an effective display area on the side of a light supplementing light source is configured to enable light rays from the light supplementing light source to irradiate to the edge of the effective display area to act with corresponding pixels of the top liquid crystal panel and/or other lower liquid crystal panels in the display area so as to realize color mixing of pixels of each display panel in the effective display area.
  2. 2. The front-lit reflective multi-stack module of claim 1, wherein the edge of the active display area of the underlying liquid crystal panel is provided with transition pixels below the non-display area of the liquid crystal panel above the transition pixels.
  3. 3. The front-lit reflective multi-stack module of claim 2, wherein the transition pixels are controlled by the same circuitry as display pixels of adjacent active display areas.
  4. 4. The reflection type multi-screen module with front light according to claim 2 or 3, wherein the display pixels are arranged such that the display layer of at least one lower liquid crystal panel is arranged at the edge of the effective display area on the light source side, and extends to a preset width outside the effective display area.
  5. 5. The front-lit reflective multi-stack screen module of claim 4, wherein the preset width is determined based on at least one of the front light guide plate thickness, the film layer thickness of the display panel, and a maximum angle of incidence of light from the front light module in the display layer.
  6. 6. The front-lit reflective multi-panel module of claim 5, wherein for an nth display layer from top to bottom, the predetermined width L satisfies that L is greater than or equal to k tanC; Wherein C is the maximum incident angle of the light from the front light module in the display layer, and k is the positive number related to the thickness of the light guide plate, the thickness of the N-th layer and above each display panel film layer and the thickness of the interlayer bonding layer.
  7. 7. The reflection type multi-screen module with front light according to claim 2 or 3, wherein the arrangement is such that at least one layer of the liquid crystal panel is moved by a predetermined width to the outside of the effective display area in the light shielding area of the edge of the effective display area on the light source side.
  8. 8. The front-lit reflective multi-stack screen module of claim 7, wherein the preset width is determined based on at least one of the front light guide plate thickness, the film layer thickness of the display panel, and a maximum angle of incidence of light from the front light module in a display layer.
  9. 9. The front-lit reflective multi-stack module of claim 1, wherein the top and bottom liquid crystal panels are cholesteric liquid crystal panels.
  10. 10. A display device comprising a front-lit reflective multi-stack module according to any one of claims 1 to 9.

Description

Reflective multi-screen-overlapping module with front light and display device Technical Field The invention relates to the technical field of reflective liquid crystal display, in particular to a reflective multi-screen-overlapping module with front light and a display device. Background The reflective display screen is widely applied to the fields of electronic price tags, portable equipment and the like as a low-power-consumption display technology. Color reflective displays typically employ a multi-layer liquid crystal panel stack structure, with each layer of liquid crystal panel reflecting one color of light to achieve color display. Since the reflective display displays by reflecting ambient light, the reflective display generally integrates a light guide plate and a light source on a front side to form a front light system in order to improve visibility in a dark light environment. The light source is located at one end of the light guide plate, and the end is distributed above the panel through the light guide plate. The display panel includes a display area having display pixels and a non-display area for circuit connection and the like, and the non-display area is shielded by providing a BM (black matrix) area. The light incident into the screen from the light source side light guide plate located in the non-display area has an angle, and the part of the light is just at the edge of the BM area. Therefore, since the front light is incident into the screen at a certain angle, for the stacked multi-layer liquid crystal panels, the light emitted from the pixels at the edge of the lower layer screen at the light source side is blocked by the light shielding region of the upper layer screen, so that the visual defects of color delamination and color mixing insufficiency appear at the edge of the screen when the front light is started, and the overall uniformity and the image quality of the display picture are seriously affected, as shown in fig. 1 and 2. Disclosure of Invention In order to solve the technical problems in the background technology, the invention provides a reflection type multi-screen-overlapping module with front light and a display device. The invention provides a reflection type multi-screen-overlapping module with front light, which comprises a front light module and a display module; The front light module comprises a light guide plate and a light supplementing light source, the display module comprises an effective display area and a non-display area, the front light guide plate is positioned at one side of the display module, and the light supplementing light source is positioned at one end of the front light guide plate, which is close to the non-display area, so that light rays emitted by the light supplementing light source are uniformly emitted by the front light guide plate and then are emitted into a reflective liquid crystal panel of the display module; The display module comprises a top liquid crystal panel and at least one lower liquid crystal panel, wherein the pixel layout of the lower liquid crystal panel at the edge of an effective display area on the side of a light supplementing light source is configured to enable light rays from the light supplementing light source to irradiate to the edge of the effective display area to act with corresponding pixels of the top liquid crystal panel and/or other lower liquid crystal panels in the display area so as to realize color mixing of pixels of each display panel in the effective display area. Preferably, the edge of the effective display area of the lower liquid crystal panel is provided with transition pixels, and the transition pixels are positioned below the non-display area of the upper liquid crystal panel. Preferably, the transition pixels are controlled by the same circuitry as the display pixels of the adjacent active display area. Preferably, the display pixels of at least one lower layer liquid crystal panel at the edge of the effective display area on the light source side extend to the outside of the effective display area by a preset width. Preferably, the preset width is determined based on at least one of the front light guide plate thickness, the film layer thickness of the display panel, and the maximum incident angle of the light from the front light module in the display layer. Preferably, for the N-th display layer from top to bottom, the preset width L satisfies that L is greater than or equal to k tanC; Wherein C is the maximum incident angle of the light from the front light module in the display layer, and k is the positive number related to the thickness of the light guide plate, the thickness of the N-th layer and above each display panel film layer and the thickness of the interlayer bonding layer. Preferably, the configuration is that at least one layer of the display layer is moved by a preset width to the outside of the effective display area at the shading area of the edge of the effective